I first tried with requests and bs4 but it didn't work, the captcha came, so, instead, I had to use mechanize to browse the url, I mean, I could've used mechanize to fill out the form, and then, parse html, but why bother when you can just do this?

reverseDNS.py

import mechanize 
from bs4 import BeautifulSoup 

name = input("Enter the name you wanna search for: ").replace(" ", "+")
br = mechanize.Browser()
br.addheaders = [("User-agent","Mozilla/5.0")]

resp = br.open("https://viewdns.info/reversewhois/?q={}".format(name))

soup = BeautifulSoup(resp.read(), "lxml")
soup = soup.find("table", attrs={'id':'null'})
soup = soup.find('table')

print("The following mached the records: ")
for x in soup.findAll('tr'):
    print(x.find('td').text)